If X<0, then Sq root (-X lXl ) = ?
a) -X
b) -1
c) 1
d) x
E) Sq root X
why is the answer a) not d)? I thought lxl = +X , and - (-x) = +x , so the product of these are X^2. Sq root of this is X. no?
a) -X
b) -1
c) 1
d) x
E) Sq root X
why is the answer a) not d)? I thought lxl = +X , and - (-x) = +x , so the product of these are X^2. Sq root of this is X. no?
